What Does A Router Do; Bridgehead To The Wan - Lancom DSL Series Manual

technology used is not relevant in this case: ideally is the use of broadband
technologies such as DSL (Digital Subscriber Line) or G.703 (2-Mbit leased
lines). But also a conventional ISDN line can be used.
The technologies of the individual participants do not have to be compatible
to one another, as would be the case for conventional direct connections. A
single Internet access can be used to establish multiple simultaneous logical
connections to a variety of remote stations.
The resulting savings and high flexibility makes the Internet (or any other IP
network) an outstanding backbone for a corporate network.
1.3

What does a router do?

The following sections describe the functionality of routers in general.
The functions supported by your device are listed in the table 'What
can your LANCOM Wireless DSL do?' →page 18.
Routers connect LANs at different locations and individual PCs to form a Wide
Area Network (WAN). With the appropriate rights, any computer in this WAN
can access other computers and services of the complete WAN (as with 'PC 1'
accessing 'Server A' in the remote LAN in the diagram).
LAN 1
Connecting a LAN to the Internet does not technically differ from coupling
two LANs. The only difference is that it is not just a handful of computers
behind the Internet provider's router. Instead, it is the net of the networks -
the public Internet.
1.3.1

Bridgehead to the WAN

All routers have at least two connections:
at least one for the LAN
LANCOM Wireless DSL – LANCOM Wireless ADSL
PC 1
WAN connection
router
Chapter 1: Introduction
server A
router
LAN 2
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